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NOAA releases new edition of nautical chart symbol guide - Office of Coast Survey
U.S. Chart No. 1 - 13th Edition: Symbols, Abbreviations and Terms used on Paper and Electronic Navigational Charts: National Oceanic and Atmospheric Administration, National Geospatial-Intelligence Agency: 9781937196295: Amazon.com: Books
OceanGrafix - NOAA Charts
What's the difference between a nautical chart and a map?
NOAA Chart 18649: Entrance to San Francisco Bay - Captain's Nautical Books & Charts
NOAA's latest mobile app provides free nautical charts for recreational boating | National Oceanic and Atmospheric Administration